CN204284038U - A kind of energy-saving dynamic system for Servo Injection Molding Machine - Google Patents
A kind of energy-saving dynamic system for Servo Injection Molding Machine Download PDFInfo
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- CN204284038U CN204284038U CN201420717596.2U CN201420717596U CN204284038U CN 204284038 U CN204284038 U CN 204284038U CN 201420717596 U CN201420717596 U CN 201420717596U CN 204284038 U CN204284038 U CN 204284038U
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Abstract
The utility model discloses a kind of energy-saving dynamic system for Servo Injection Molding Machine, comprise fuel tank, tachogenerator, motor servo driver, actuating motor, controller, pressure transducer, pipeline road, proportional flow control valve, oblique row angle controls oil cylinder, variable oil drain pump, oil pump valve plate, described variable oil drain pump is arranged on described pipeline road, actuating motor is arranged on and becomes on displacement oil pump, with described actuating motor while of described motor servo driver, described tachogenerator, and controller is connected, variable oil extraction delivery side of pump is connected with oil pump valve plate, described pressure transducer is arranged on described oil pump valve plate, described pressure transducer is connected with controller and motor servo driver, described proportional flow control valve is arranged on described variable oil drain pump, described proportional flow control valve is connected with the output terminal of controller.Advantage of the present utility model: effectively reduce injection machine power system cost, improve the efficiency of energy utilization of actuating motor, there is significant energy saving.
Description
Technical field
The utility model relates to a kind of power system, belongs to the technical field of Servo Injection Molding Machine, especially a kind of energy-saving dynamic system for Servo Injection Molding Machine.
Background technique
Injection machine is a kind of machine of injection-moulding plastic, is haveing suffered in running, generally comprise injection, pressurize, storing, seat move back, die sinking, eject, the action such as matched moulds, seat enter, each action all needs different pressure and flow.Need larger flow during as injected, when die cavity is injected full soon, general pressure can increase, and flow can reduce; When closing mould, pressure is lower in earlier stage, as long as promote template movement, needs larger flow, really need very high pressure and lower flow during later stage high-voltage lock mould in order to pick up speed, when seat stand action, then usually only needs lower flow and pressure.Design method routinely, for meeting larger flow, then needs the oil pump compared with huge discharge; Can high pressure be produced under realizing huge discharge, then need motor to export larger moment of torsion.When large pressure, small flow, actuating motor, servo driver all can generate heat, and produce more energy loss, and huge discharge oil pump and high pulling torque motor all can make machine have larger hardware cost.
Power system roughly has Three models:
1, metering pump power system composition: threephase asynchronous machine, metering pump, proportional pressure valve and proportional flow control valve etc.Threephase asynchronous machine provides the rotating power of a fixed rotating speed; Under threephase asynchronous machine drives, fixed displacement output hydraulic pressure oil pressed by metering pump; And the different pressure that each action of system needs and flow, controlled by proportional pressure valve and proportional flow control valve respectively.When in pressurize, when injection machine operating pressure is greater than setting value, the oil that oil pump is discharged cannot enter system, then the oil pump oily passing ratio pressure valve of discharging and proportional flow control valve flow back to fuel tank; When injection machine operating pressure is less than setting value, proportional pressure valve keeps closing, and does not have oily passing ratio pressure valve and flows back to fuel tank; When injection machine action does not need whole flow, unnecessary flow passing ratio Flow valve flows back to fuel tank.Passing ratio pressure valve or proportional flow control valve flow back to fuel tank hydraulic oil, unhelpful for each action of injection machine, done idle work, create larger energy loss in the middle of system.No matter machine whether action, threephase asynchronous machine, also can consumed energy all in work, causes the loss of energy.
2, variable displacement pump power system composition: threephase asynchronous machine, variable displacement pump, displacement control Proportional valve, proportional pressure valve etc.Threephase asynchronous machine provides the rotating power of a fixed rotating speed; Under threephase asynchronous machine drives, variable displacement pump is by by the flow value of upper-position unit setting, being adjusted the actual displacement of oil pump by discharge capacity Proportional valve; The pressure passing ratio pressure valve that injection machine needs regulates, and when in pressurize etc., when injection machine operating pressure is greater than setting value, the oil that oil pump is got rid of, cannot be input in system or passing ratio pressure valve flows back to fuel tank.Variable pump systems makes great progress in energy-conservation than Constant Pump System, when speed control mode, the flow that variable pump systems only provides system to need, unnecessary flow can not be provided, but in the pressure control mode, pay close attention to the stable of pressure, certainly have section hydraulic oil passing ratio pressure valve can overflow back fuel tank, the loss of this part energy cannot be avoided.
3, servo power system composition: servo driver, servo synchronous machine, metering pump, relief valve (safety valve) etc.Servo driver can control servo synchronous machine and export different rotating speeds, thus drives metering pump to export different flows.And by detecting the rotating speed coder be arranged on actuating motor, closed loop control can be carried out to motor rotary motion, thus the flow that when can stablize same action in each cycle, metering pump exports.By detecting the pressure transducer be arranged in system; closed loop control can be carried out to the moment of torsion of motor rotary motion, when pressurize etc. needs pressure controlled action, the pressure with this action in each all devices can be stablized; when the action that non-pressure controls, can be used as pressure protect and use.Relief valve plays safety protection effect in systems in which.Only have when servo driver breaks down, system pressure is uncontrolled, exceeds equipment and allows to work during maximum pressure.Servo power system than Constant Pump System and variable pump systems all more energy-conservation, because it can need to provide pressure and flow accurately according to each action, do not produce unnecessary Flux Loss, and when cooling etc. does not need machine operation, servo electrical machinery system can stop the running of motor, can avoid the meaningless energy loss running generation.But actuating motor can reduce the feature of the rotating speed of motor, make it use gear pump or plunger pump etc., can not vane pump be used.And be no matter gear pump or plunger pump operationally, system pressure all according to the number of teeth of rotating speed and oil pump or plunger number, can produce and pulse accordingly.When high pressure, low discharge, as pressurize action, or at a slow speed high-pressure injection time, pulse more obvious.
Using hydraulic oil as on the injection machine of power, servo power system is power scheme the most energy-conservation at present.The design method of servo power routinely, the flow of system is the product of motor speed and oil pump capacity, generally adopts metering pump, flow system flow also just and motor speed be directly proportional.The frequency dependence that motor speed and servo driver export, namely relevant to the effective voltage that actuating motor exports, the pressure of system is relevant with oily pump delivery to the moment of torsion of motor, and the moment of torsion of motor is pressure and the oil pump capacity product of system.In rated power, Motor torque is directly proportional to current of electric.General design servo power system, for meeting larger flow, then needs the oil pump compared with huge discharge; Can high pressure be produced in order under each operating mode again, then need motor to export larger moment of torsion.When injection machine action needs larger pressure, actuating motor needs larger moment of torsion, for producing larger moment of torsion, actuating motor and servo driver need larger electric current, electric current is larger, and actuating motor, servo driver heating value are larger, produce more energy loss.And huge discharge oil pump and high pulling torque motor all can make machine have larger hardware cost.
Model utility content
The purpose of this utility model is to make up the deficiencies in the prior art, provides a kind of power reducing actuating motor and motor servo driver, and the final cost reducing machine, has the energy-saving dynamic system for Servo Injection Molding Machine of energy-saving effect simultaneously.
In order to reach the purpose of this utility model, technological scheme is as follows:
A kind of energy-saving dynamic system for Servo Injection Molding Machine, it is characterized in that: comprise fuel tank, tachogenerator, motor servo driver, actuating motor, controller, pressure transducer, pipeline road, proportional flow control valve, tiltedly row angle control oil cylinder, variable oil drain pump, oil pump valve plate
Described variable oil drain pump is arranged on described pipeline road, and actuating motor is arranged on and becomes on displacement oil pump,
Described motor servo driver is connected with described actuating motor, described tachogenerator and controller simultaneously,
Variable oil extraction delivery side of pump is connected with oil pump valve plate, and described pressure transducer is arranged on described oil pump valve plate,
Described pressure transducer is connected with controller and motor servo driver, and described proportional flow control valve is arranged on described variable oil drain pump, and described proportional flow control valve is connected with the output terminal of controller.
As preferred technological scheme: described change displacement oil pump is provided with swash plate positions sensor, described swash plate positions sensor is connected with described motor servo driver.
As preferred technological scheme: variable oil drain pump required power when system maximum pressure and peak rate of flow is greater than the rated power of actuating motor or servo driver.
Controller is PLC (Programmable Logic Controller, PLC), i.e. programmable logic controller (PLC).Controller and servo driver carry out connecting communication by bus.
Swash plate positions sensor is for measuring variable oil extraction pump delivery, and servo driver can according to the signal of the swash plate positions sensor on variable oil drain pump, adjustment output speed, and then by actuating motor adjustment variable oil extraction pump delivery.
Servo driver and actuating motor are doing high pressure injection at low velocity, or during low speed pressurize, controller regularly adjusts variable oil drain pump discharge capacity, servo driver and actuating motor is made to keep less electric current, actuating motor keeps higher rotating speed, thus ensure work for a long time, and stable pressure.
Energy-saving dynamic system comprises actuating motor, servo driver, variable oil drain pump, pressure transducer, bus communication line and controller.Connected by bus between controller and servo driver, the signal in bus comprises pressure, flow instruction signal, variable oil drain pump discharge capacity signal etc. and other signals.Servo driver accepts upper-position unit signal, and after accepting the signals such as pressure transducer in system, swash plate positions sensor, motor speed coding, output voltage and electric current as calculated, drives actuating motor to run by certain rotating speed and moment of torsion; In addition, after servo driver accepts upper-position unit signal, the flow of output flow SC sigmal control variable oil drain pump.Variable oil drain pump is the Variable plunger pump of band swashplate position feedback, the moment of torsion that variable oil drain pump needs under the highest system pressure of injection machine is 1.5 ~ 2 times of actuating motor rated torque, and actuating motor required electric current when maximum pressure maximum oil pump displacement is 1.8 ~ 2.3 times of the rated current of servo driver.
Controlling method of the present utility model is: when injection machine runs each action, upper-position unit all can send pressure, flow, variable displacement pump and tiltedly arrange angle command signal etc., variable displacement pump tiltedly arranges angle can carry out ratio output according to different actions, during as large discharge actions such as injection, storings, export by setting flow value, except injection, storing action, obtain x% (x numerical value can set on upper-position unit, and the moment of torsion needed under system pressure according to the x% of oil pump capacity is that 1.2 times of the rated torque of motor calculate) by setting flow value during all the other actions to export; When action of injection, early stage, die cavity was not filled, load is lower, and variable oil drain pump discharge capacity maximal servo motor also can bear, along with mould filling, load constantly increases, when actuating motor electric current exceedes 1.5 times of servo driver load current value, servo driver tiltedly arranges angle from main regulation oil pump, reduces variable oil drain pump discharge capacity, control actuating motor electric current within 1.5 times of servo driver load current value, actuating motor rotating speed maintains a higher rotating speed simultaneously.Namely according to the situation of change of pressure, flow, by changing the method such as discharge capacity, motor speed, reduce the power of actuating motor and motor servo driver, the final cost reducing machine, have more energy-conservation effect, the plastic article injection moulding being applicable to the overwhelming majority is produced simultaneously.
The beneficial effect that the utility model has:
Under each action, variable oil drain pump discharge capacity all presses the flow value change of setting, and all settings not reaching 99% flow all can reduce variable oil drain pump and export discharge capacity, namely can reduce actuating motor moment of torsion.Lower Motor torque means lower motor cost, reduces actuating motor moment of torsion, namely can reduce actuating motor electric current, servo driver electric current, can select the driver of small dimension, reduces the cost of servo driver; Less electric current, can reduce the heating value of actuating motor, improves actuating motor efficiency, more energy-conservation than the injection machine servo power system of routine; Can with arranging reduction discharge capacity, also just can maintain actuating motor rotating speed in speed faster, hydro pulse can reduce, and machine runs more steady.When long-time high pressure injection at low velocity or pressurize, variable oil drain pump reduces discharge capacity in proportion, avoid actuating motor overload-alarm, and energy-saving effect is the most obvious; Larger variable oil drain pump discharge capacity configuration, can the phase provides larger flow system flow before the injection, can meet rapid shaping requirement, enhance productivity.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the utility model energy-saving dynamic system.
Embodiment
Below in conjunction with embodiment, the utility model is further described, but protection domain of the present utility model is not only confined to embodiment.
As shown in Figure 1, a kind of energy-saving dynamic system for Servo Injection Molding Machine, comprise fuel tank 1, tachogenerator 3, motor servo driver 4, actuating motor 5, controller 6, pressure transducer 7, pipeline road 8, proportional flow control valve 9, tiltedly row angle control oil cylinder 10, variable oil drain pump 11, swash plate positions sensor 12, oil pump valve plate 13.
Pipeline road 8 and fuel tank 1 are connected, and pipeline road 8 is provided with oil-suction oil filter 2 with connection place of fuel tank 1, and variable oil drain pump 11 is arranged on pipeline road 8, and actuating motor 5 is arranged on and becomes on displacement oil pump 11.Motor servo driver 4 is connected with actuating motor 5, tachogenerator 3 and controller 6 simultaneously, and tachogenerator 3 is for measuring the rotating speed of actuating motor 5.
The output terminal of variable oil drain pump 11 is connected with oil pump valve plate 13, and pressure transducer 7 is arranged on oil pump valve plate 13, and pressure transducer 7 is also connected with pipeline road 8 and can tests the oil pressure in pipeline road 8.Pressure transducer 7 is connected with controller 6 and motor servo driver 4, and the oil pressure data in pipeline road 8 can be passed to controller 6, the pressure of system is also regulated by motor servo driver 4, more energy-conservation.
Proportional flow control valve 9 is arranged on variable oil drain pump 11, and variable oil drain pump 11 passing ratio Flow valve 9 controls discharge capacity, and proportional flow control valve 9 is connected with the output terminal of controller 6.
Become on displacement oil pump 11 and be provided with swash plate positions sensor 12, swash plate positions sensor 12 is for measuring the discharge capacity of variable oil drain pump 11, swash plate positions sensor 12 is connected with motor servo driver 4, and the discharge capacity signal of variable oil drain pump 11 is passed to motor servo driver 4.
Variable oil drain pump 11 required power when system maximum pressure and peak rate of flow is greater than the rated power of actuating motor 5 or servo driver 4.
Controller 6 is except receiving the force value of pressure transducer 7 detection, also receive corresponding Detection Information on injection machine, voltage, the electric current of controller 6 control information and corresponding Detection Information control motor servo driver 4 needed for input export and oil pump capacity signal, motor servo driver 4 controls rotating speed and the moment of torsion of actuating motor 5, the rotating speed of actuating motor 5 carries out closed loop control by the output signal of tachogenerator 3, and pressure carries out closed loop control by the signal gathering pressure transducer 7; Actuating motor 5 drives variable oil drain pump 11 to system fuel feeding.
In this patent, motor encoder can be utilized, realize actuating motor 5 speed closed loop by motor servo driver 4 to control, swash plate positions sensor 12 can be utilized, the closed loop control of variable oil drain pump 11 discharge capacity is realized by motor servo driver 4, pressure transducer 7 can be utilized, realize system pressure closed loop control by motor servo driver 4.
After variable oil drain pump 11 changes discharge capacity, the power configuration of motor servo driver 4, actuating motor 5 can be reduced, and traditional metering pump cannot understand discharge capacity, just cannot reduce motor servo driver 4, actuating motor power configuration 5. in addition, after reducing variable oil drain pump 11 discharge capacity, the effect more stably that raising actuating motor 5 rotating speed brings can be realized, also can reduce the electric current of actuating motor 5, motor servo driver 4 simultaneously, more energy-conservation effect cannot be realized.
In addition, by the flow of motor servo driver 4 and variable oil drain pump 11 regulating system, the rotating speed of the actuating motor 5 that motor servo driver 4 is controlled and the product of variable oil drain pump 11 discharge capacity are directly proportional to flow system flow.
In injection machine work, controller 6 can to signals such as motor servo driver 4 incoming pressure, flow, oil pump capacity.Flow refers to the volume of unit time by hydraulic oil of fuel pump outlet, is determined by motor speed and oil pump capacity.Oil pump capacity signal adjustment actuating motor 5 rotating speed that servo driver 4 can provide according to controller 6, thus the flow system flow needed for realizing.When injection and storing process, the flow that usually needs are larger, oil pump capacity signal is that on oil pump total displacement and controller 6, the product of setting value determines.At this moment injection machine is as during with pressure maximum and flow work, and actuating motor 5 and motor servo driver 4 are in safe Short-time Overload state, at utmost can utilize resource.When other actions, usual flow is less, oil pump capacity signal is that (x numerical value can set on upper-position unit for the x% of oil pump total displacement, the moment of torsion needed under system pressure according to the x% of oil pump capacity is that 1.2 times of the rated torque of actuating motor 5 calculate), determine with the product of setting value on controller 6, at this moment the load of actuating motor 5 is lower again, effectively can reduce the electric current of actuating motor 5, reduce heating loss, improve machine operational efficiency.
Last it is noted that above embodiment only in order to illustrate the utility model and and technological scheme described by unrestricted the utility model, therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment, but, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, and all do not depart from technological scheme and the improvement thereof of spirit and scope of the present utility model, it all should be encompassed in right of the present utility model.
Claims (3)
1. the energy-saving dynamic system for Servo Injection Molding Machine, it is characterized in that: comprise fuel tank (1), tachogenerator (3), motor servo driver (4), actuating motor (5), controller (6), pressure transducer (7), pipeline road (8), proportional flow control valve (9), tiltedly row angle control oil cylinder (10), variable oil drain pump (11), oil pump valve plate (13)
Described variable oil drain pump (11) is arranged on described pipeline road (8), and actuating motor (5) is arranged on and becomes on displacement oil pump (11),
Described motor servo driver (4) is connected with described actuating motor (5), described tachogenerator (3) and controller (6) simultaneously,
The output terminal of variable oil drain pump (11) is connected with oil pump valve plate (13), and described pressure transducer (7) is arranged on described oil pump valve plate (13),
Described pressure transducer (7) is connected with controller (6) and motor servo driver (4), described proportional flow control valve (9) is arranged on described variable oil drain pump (11), and described proportional flow control valve (9) is connected with the output terminal of controller (6).
2. the energy-saving dynamic system for Servo Injection Molding Machine according to claim 1, it is characterized in that: described change displacement oil pump (11) is provided with swash plate positions sensor (12), described swash plate positions sensor (12) is connected with described motor servo driver (4).
3. the energy-saving dynamic system for Servo Injection Molding Machine according to claim 1, is characterized in that: variable oil drain pump (11) required power when system maximum pressure and peak rate of flow is greater than the rated power of actuating motor (5) or servo driver (4).
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106194910A (en) * | 2016-08-24 | 2016-12-07 | 宁波弘讯科技股份有限公司 | A kind of press and hydraulic pressure closed-loop control system thereof and method |
| CN106870475A (en) * | 2017-04-01 | 2017-06-20 | 苏州星贝尔中空成型科技股份有限公司 | A kind of hollow blow molding machine hydraulic system |
| CN107053621A (en) * | 2017-03-14 | 2017-08-18 | 德玛仕电液技术（苏州）有限公司 | A kind of miniature servo-hydraulic power station |
| CN107246415A (en) * | 2017-08-01 | 2017-10-13 | 无锡海天机械有限公司 | A kind of servo-drive band variable pump low speed control hydraulic circuit |
| CN110219839A (en) * | 2019-07-10 | 2019-09-10 | 济南东测试验机技术有限公司 | A kind of mute oil sources of testing machine electro-hydraulic servo dynamic test energy-saving servo |
| CN111842526A (en) * | 2020-06-10 | 2020-10-30 | 佛山市恒力泰机械有限公司 | Speed control method, system and control device for aluminum profile extruder |
| CN113513507A (en) * | 2021-06-25 | 2021-10-19 | 中航力源液压股份有限公司 | Control device for reducing starting torque of electric pump |
| WO2023185114A1 (en) * | 2022-03-31 | 2023-10-05 | 中联重科股份有限公司 | Control method for engineering device, and processor and engineering device |
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- 2014-11-25 CN CN201420717596.2U patent/CN204284038U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194910A (en) * | 2016-08-24 | 2016-12-07 | 宁波弘讯科技股份有限公司 | A kind of press and hydraulic pressure closed-loop control system thereof and method |
| CN107053621A (en) * | 2017-03-14 | 2017-08-18 | 德玛仕电液技术（苏州）有限公司 | A kind of miniature servo-hydraulic power station |
| CN106870475A (en) * | 2017-04-01 | 2017-06-20 | 苏州星贝尔中空成型科技股份有限公司 | A kind of hollow blow molding machine hydraulic system |
| CN107246415A (en) * | 2017-08-01 | 2017-10-13 | 无锡海天机械有限公司 | A kind of servo-drive band variable pump low speed control hydraulic circuit |
| CN110219839A (en) * | 2019-07-10 | 2019-09-10 | 济南东测试验机技术有限公司 | A kind of mute oil sources of testing machine electro-hydraulic servo dynamic test energy-saving servo |
| CN111842526A (en) * | 2020-06-10 | 2020-10-30 | 佛山市恒力泰机械有限公司 | Speed control method, system and control device for aluminum profile extruder |
| CN113513507A (en) * | 2021-06-25 | 2021-10-19 | 中航力源液压股份有限公司 | Control device for reducing starting torque of electric pump |
| CN113513507B (en) * | 2021-06-25 | 2023-01-03 | 中航力源液压股份有限公司 | Control device for reducing starting torque of electric pump |
| WO2023185114A1 (en) * | 2022-03-31 | 2023-10-05 | 中联重科股份有限公司 | Control method for engineering device, and processor and engineering device |
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